Mount Etna in Sicily, the largest active volcano in Europe, has been blowing spectacular “smoke rings” into the sky since Wednesday. The "volcanic vortex rings", a rare phenomenon that is generated by the combination of rapid gas release and the vent shape, spewed out of a new crater that opened on Tuesday on Etna's summit. #etna #etnavolcano #mountetna
![](https://i.ytimg.com/vi/8oBytfWY_Cs/maxresdefault.jpg)